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[SOVLED]Calculated speed vary from SimulANT+

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Total Posts: 123

Joined 2013-10-07

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Hi guys,

I'm decoding the speed data from a speed & cadence sensor and the decoded speed slightly vary from the SimulANT+ sensor value
Here is an screenshot example coming from my software :
https://www.dropbox.com/s/djkvjkahadjc15t/diffSpeed.png

I just want to make sure that the SimulANTT+ software calculates the speed correctly first, it seems rounded?
If not, I need to make sure to fix my incorrect speed calculation as this is a scientific software, no error permitted smile

I used the code from
"antplus_bike_speed_and_cadence_v1.3.0\antplus_cbsc_rx\display\cbsc\main_cbsc.c"
to decode speed correctly. oh and the wheel circumference is the same in both application (2120cm)



[EDIT: wait I think I wasn't looking at the calculated data on SimulANT+... silly me]      

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Total Posts: 123

Joined 2013-10-07

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Fixed, I was not looking at the right data on SimulANT+ software.
Thanks!      

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Joined 2012-10-09

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That is correct, you should be looking at the values under Calculated Data to see the actual speed transmitted. The difference between the configured (intended) and calculated (actual) values is due to the way speed/cadence are encoded for bike speed and cadence, and the resolution of the data.